In six steps, this animation depicts the changes that have occurred over time to the global carbon cycle, including the amount of carbon existing in and moving between the planet's major carbon reservoirs before and after 1800.
Learn more: http://www.gao.gov/products/GAO-11-71
Get Transcript: http://www.gao.gov/videofiles/gao_11_71_carbon_cycle/gao_11_71_carbon_cycle.txt
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